Western Digital hard disks and ATA timeouts

Artem Belevich fbsdlist at src.cx
Fri Nov 7 00:08:04 PST 2008


> Note that Western Digital's "RAID edition" drives claim to take up to 7
> seconds to reallocate sectors, using something they call TLER, which
> force-limits the amount of time the drive can spend reallocating.  TLER
> cannot be disabled:

TLER can be enabled/disabled on recent WD drives (SE16/RE2/GP). SE16/GP
come with TLER off, RE2 with TLER on. Google WDTLER utility.
It can apparently be obtained from WD by asking them nicely.
Or, yet again, google is your friend. Here's one example -
http://www.hardforum.com/archive/index.php/t-1191548.html

--Artem


More information about the freebsd-stable mailing list